3 ms·
Wait, USB-C doesn't let you charge smartphones faster than at 2A? So it won't be any faster than what you can do right now? Why doesn't it let you charge at 10A
by higherpurpose 12y ago
Wait, USB-C doesn't let you charge smartphones faster than at 2A? So it won't be any faster than what you can do right now? Why doesn't it let you charge at 10A? Is it because small batteries can't take so much energy so fast? What's the deal with those "charge half of your battery in 15 minutes" statements we see for some of the recent devices?
- lsaferite 12y agoType-C works with USB-PD. USB-PD can negotiate up to 100W of power delivery via 20V@5A. Increasing the amperage over 5A makes the connection more dangerous and increases the cabling requirements. If your smart phone or tablet implement USB-PD and can handle 100W of power then it could charge at 20V@5A VERY quickly.
- Sanddancer 12y agoBattery charging is asymptotical. In the beginning, they accept quite a bit of charge current, and thus can charge quickly. As you get closer to fully charged, the battery cannot safely have as much current pumped into it, so you have to back off on the current as you get closer and closer to fully charged. Bigger batteries, like in laptops, have multiple cells, to attain higher voltages, so that extra current can be directed to each cell. So, in short, no, USB-C won't let you charge phones all that much faster than at 2A